Blades & guards are typically soldered. The way the brass & steel are brazed together is very impressive. John Nelson Cooper and Gary Little are the only makers I'm familiar with that would do that. The sheath is typical of 1940's & 50's for Western, Marble's, Ka-Bar, ect. I don't think it actually came with the knife, it's too simple. The blade is very much like Cooper's... I'd start there if I was you. Nice find...